init: git clone https://github.com/iuroc/bilidown.git

2026-04-02 15:16:34 +08:00
commit 4facf82956
58 changed files with 6630 additions and 0 deletions
@@ -0,0 +1,3 @@
+[build]
+exclude_dir = ["download", "bin"]
+include_ext = ["go"]
@@ -0,0 +1,71 @@
+# This is an example .goreleaser.yml file with some sensible defaults.
+# Make sure to check the documentation at https://goreleaser.com
+
+# The lines below are called `modelines`. See `:help modeline`
+# Feel free to remove those if you don't want/need to use them.
+# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
+# vim: set ts=2 sw=2 tw=0 fo=cnqoj
+
+version: 2
+
+before:
+    hooks:
+        # You may remove this if you don't use go modules.
+        - go mod tidy
+        # you may remove this if you don't need go generate
+        - go generate ./...
+
+builds:
+    - id: bilidown_windows
+      env:
+          - CGO_ENABLED=1
+          - >-
+              {{- if eq .Arch "amd64" }}CC=x86_64-w64-mingw32-gcc{{ end }}
+              {{- if eq .Arch "386" }}CC=i686-w64-mingw32-gcc{{ end }}
+      goos:
+          - windows
+      ldflags:
+          - -s -w -H windowsgui
+    - id: bilidown_darwin
+      env:
+          - CGO_ENABLED=1
+          - CC=o64-clang
+      goos:
+          - darwin
+      ldflags:
+          - -s -w
+    - id: bilidown_linux
+      env:
+          - CGO_ENABLED=1
+          - >-
+              {{- if eq .Arch "arm64" }}CC=aarch64-linux-gnu-gcc{{ end }}
+      goos:
+          - linux
+      goarch:
+          - amd64
+      ldflags:
+          - -s -w
+archives:
+    - format: tar.gz
+      # this name template makes the OS and Arch compatible with the results of `uname`.
+      name_template: >-
+          {{ .ProjectName }}_
+          {{- title .Os }}_
+          {{- if eq .Arch "amd64" }}x86_64
+          {{- else if eq .Arch "386" }}i386
+          {{- else }}{{ .Arch }}{{ end }}
+          {{- if .Arm }}v{{ .Arm }}{{ end }}
+      # use zip for windows archives
+      format_overrides:
+          - goos: windows
+            format: zip
+      files:
+          - static/**
+          - >-
+              {{- if eq .Os "windows" }}bin/ffmpeg.exe{{- end }}
+changelog:
+    sort: asc
+    filters:
+        exclude:
+            - "^docs:"
+            - "^test:"
@@ -0,0 +1,146 @@
+package bilibili_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+	"time"
+
+	"bilidown/bilibili"
+	"bilidown/util"
+
+	"github.com/skip2/go-qrcode"
+	_ "modernc.org/sqlite"
+)
+
+const TEST_SESSDATA = ""
+const TEST_BVID = "BV1KX4y1V7sA"     // 普通合集
+const TEST_CID = 305542578           // 普通分集
+const TEST_BVID_HDR = "BV1rp4y1e745" // HDR 合集
+const TEST_CID_HDR = 244954665       // HDR 分集
+const TEST_EPID = 835909             // 剧集
+const TEST_SSID = 48744              // 番剧
+
+func TestBiliClient(t *testing.T) {
+	client := bilibili.BiliClient{SESSDATA: TEST_SESSDATA}
+	check, err := client.CheckLogin()
+	if err != nil {
+		t.Error(err)
+	}
+	if check {
+		fmt.Println("SESSDATA 有效")
+	} else {
+		fmt.Println("SESSDATA 无效")
+	}
+}
+
+func TestNewQRInfo(t *testing.T) {
+	client := bilibili.BiliClient{}
+	info, err := client.NewQRInfo()
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Printf("二维码信息：%+v", info)
+}
+
+func TestGetQRStatus(t *testing.T) {
+	client := bilibili.BiliClient{}
+	qrInfo, err := client.NewQRInfo()
+	if err != nil {
+		t.Error(err)
+	}
+	qr, err := qrcode.New(qrInfo.URL, qrcode.Low)
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Println(qr.ToSmallString(false))
+
+	for {
+		qrStatus, sessdata, err := client.GetQRStatus(qrInfo.QrcodeKey)
+		fmt.Println(qrStatus.Message)
+		if err != nil {
+			t.Error(err)
+		}
+		if qrStatus.Code == bilibili.QR_SUCCESS {
+			fmt.Println("登录成功")
+			fmt.Println(sessdata)
+			break
+		} else if qrStatus.Code == bilibili.QR_EXPIRES {
+			break
+		}
+		time.Sleep(time.Second)
+	}
+}
+
+func TestGetBVInfo(t *testing.T) {
+	client := bilibili.BiliClient{SESSDATA: TEST_SESSDATA}
+	videoInfo, err := client.GetVideoInfo(TEST_BVID)
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Printf("%+v", videoInfo)
+}
+
+func TestGetSeasonInfo(t *testing.T) {
+	client := bilibili.BiliClient{SESSDATA: TEST_SESSDATA}
+	seasonInfo, err := client.GetSeasonInfo(TEST_EPID, TEST_SSID)
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Printf("%+v", seasonInfo)
+}
+
+func TestGetPlayInfo(t *testing.T) {
+	client := bilibili.BiliClient{SESSDATA: TEST_SESSDATA}
+	playInfo, err := client.GetPlayInfo(TEST_BVID_HDR, TEST_CID_HDR)
+	if err != nil {
+		t.Error(err)
+	}
+	a, _ := json.Marshal(playInfo.AcceptQuality)
+	b, _ := json.Marshal(playInfo.AcceptDescription)
+	c, _ := json.Marshal(playInfo.SupportFormats)
+
+	fmt.Println(string(a))
+	fmt.Println(string(b))
+	fmt.Println(string(c))
+}
+
+func TestSaveSessdata(t *testing.T) {
+	db := util.MustGetDB("../data.db")
+	defer db.Close()
+	err := bilibili.SaveSessdata(db, TEST_SESSDATA)
+	if err != nil {
+		t.Error(err)
+	} else {
+		fmt.Println("SESSDATA 保存成功")
+	}
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil {
+		t.Error(err)
+	}
+	if sessdata != TEST_SESSDATA {
+		t.Error("SESSDATA 读写不一致")
+	} else {
+		fmt.Println("SESSDATA 读取成功")
+	}
+}
+
+func TestGetSessdata(t *testing.T) {
+	db := util.MustGetDB("../data.db")
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil {
+		t.Error(err)
+	}
+
+	fmt.Println(sessdata)
+}
+
+func TestGetPopularVideos(t *testing.T) {
+	client := bilibili.BiliClient{SESSDATA: TEST_SESSDATA}
+	videos, err := client.GetPopularVideos()
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Printf("%+v", videos)
+}
@@ -0,0 +1,177 @@
+package bilibili
+
+import (
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/url"
+	"regexp"
+
+	"bilidown/util"
+)
+
+type BiliClient struct {
+	SESSDATA string
+}
+
+// SimpleGET 简单的 GET 请求
+func (client *BiliClient) SimpleGET(_url string, params map[string]string) (*http.Response, error) {
+	values := url.Values{}
+	for k, v := range params {
+		values.Set(k, v)
+	}
+	_client := http.Client{
+		Transport: &http.Transport{
+			Proxy: http.ProxyURL(nil),
+		},
+	}
+	request, err := http.NewRequest("GET", _url+"?"+values.Encode(), nil)
+	if err != nil {
+		return nil, err
+	}
+	request.Header = client.MakeHeader()
+	return _client.Do(request)
+}
+
+// MakeHeader 生成请求头
+func (client *BiliClient) MakeHeader() http.Header {
+	header := http.Header{}
+	header.Set("Cookie", "SESSDATA="+client.SESSDATA)
+	header.Set("User-Agent", "Mozilla/5.0")
+	header.Set("Referer", "https://www.bilibili.com")
+	return header
+}
+
+// CheckLogin 检查是否已经登录
+func (client *BiliClient) CheckLogin() (bool, error) {
+	response, err := client.SimpleGET("https://api.bilibili.com/x/space/myinfo", nil)
+	if err != nil {
+		return false, err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return false, err
+	}
+	if body.Code != 0 {
+		return false, errors.New(body.Message)
+	}
+	return body.Success(), nil
+}
+
+// NewQRInfo 获取登录二维码信息
+func (client *BiliClient) NewQRInfo() (*QRInfo, error) {
+	response, err := client.SimpleGET("https://passport.bilibili.com/x/passport-login/web/qrcode/generate", nil)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, err
+	}
+	if body.Code != 0 {
+		return nil, errors.New(body.Message)
+	}
+	qrInfo := QRInfo{}
+	err = json.Unmarshal(body.Data, &qrInfo)
+	if err != nil {
+		return nil, err
+	}
+	return &qrInfo, nil
+}
+
+func (client *BiliClient) getWbiKeyRemote() (wbiKey string, err error) {
+	if client.SESSDATA == "" {
+		return "", errors.New("SESSDATA 不能为空")
+	}
+	response, err := client.SimpleGET("https://api.bilibili.com/x/web-interface/nav", nil)
+	if err != nil {
+		return "", err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+	if err = json.NewDecoder(response.Body).Decode(&body); err != nil {
+		return "", err
+	}
+	var data struct {
+		WbiImg struct {
+			ImgURL string `json:"img_url"`
+			SubURL string `json:"sub_url"`
+		} `json:"wbi_img"`
+	}
+	if err = json.Unmarshal(body.Data, &data); err != nil {
+		return "", err
+	}
+	match := regexp.MustCompile(`/bfs/wbi/([a-z0-9]+)\.`)
+	imgKey := match.FindStringSubmatch(data.WbiImg.ImgURL)[1]
+	subKey := match.FindStringSubmatch(data.WbiImg.SubURL)[1]
+	if imgKey == "" || subKey == "" {
+		return "", errors.New("regexp.MustCompile(`/bfs/wbi/([a-z0-9])\\.`)")
+	}
+	return imgKey + subKey, nil
+}
+
+// GetQRStatus 获取二维码状态
+func (client *BiliClient) GetQRStatus(qrKey string) (qrStatus *QRStatus, sessdata string, err error) {
+	params := map[string]string{
+		"qrcode_key": qrKey,
+	}
+	response, err := client.SimpleGET("https://passport.bilibili.com/x/passport-login/web/qrcode/poll", params)
+	if err != nil {
+		return nil, "", err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, "", err
+	}
+	if body.Code != 0 {
+		return nil, "", errors.New(body.Message)
+	}
+	qrStatus = &QRStatus{}
+	err = json.Unmarshal(body.Data, &qrStatus)
+	if err != nil {
+		return nil, "", err
+	}
+	if qrStatus.Code != 0 {
+		return qrStatus, "", nil
+	}
+	sessdata, err = GetCookieValue(response.Cookies(), "SESSDATA")
+	if err != nil {
+		return nil, "", err
+	}
+	return qrStatus, sessdata, nil
+}
+
+// GetCookieValue 获取指定 Name 的 Cookie 值
+func GetCookieValue(cookies []*http.Cookie, name string) (string, error) {
+	for _, cookie := range cookies {
+		if cookie.Name == name {
+			return cookie.Value, nil
+		}
+	}
+	return "", errors.New("cookie with name " + name + " not found")
+}
+
+// SaveSessdata 保存 SESSDATA
+func SaveSessdata(db *sql.DB, sessdata string) error {
+	util.SqliteLock.Lock()
+	_, err := db.Exec(`INSERT OR REPLACE INTO "field" ("name", "value") VALUES ("sessdata", ?)`, sessdata)
+	util.SqliteLock.Unlock()
+	return err
+}
+
+// GetSessdata 获取 SESSDATA
+func GetSessdata(db *sql.DB) (string, error) {
+	util.SqliteLock.Lock()
+	row := db.QueryRow(`SELECT "value" FROM "field" WHERE "name" = "sessdata"`)
+	util.SqliteLock.Unlock()
+	var sessdata string
+	err := row.Scan(&sessdata)
+	return sessdata, err
+}
@@ -0,0 +1,253 @@
+package bilibili
+
+import (
+	"encoding/json"
+
+	"bilidown/common"
+)
+
+// BaseRes 来自 Bilibili 的接口响应，Message 字段为 msg
+type BaseRes struct {
+	Code    int             `json:"code"`
+	Message string          `json:"msg"`
+	Data    json.RawMessage `json:"data"`
+}
+
+// BaseRes2 来自 Bilibili 的接口响应，Message 字段为 message 而不是 msg
+type BaseResV2 struct {
+	Code    int             `json:"code"`
+	Message string          `json:"message"`
+	Data    json.RawMessage `json:"data"`
+}
+
+// BaseResV3 来自 Bilibili 的接口响应，Message 字段为 message 而不是 msg，Data 字段为 result
+type BaseResV3 struct {
+	Code    int             `json:"code"`
+	Message string          `json:"message"`
+	Result  json.RawMessage `json:"result"`
+}
+
+func (b *BaseRes) Success() bool {
+	return b.Code == 0
+}
+
+func (b *BaseResV2) Success() bool {
+	return b.Code == 0
+}
+
+func (b *BaseResV3) Success() bool {
+	return b.Code == 0
+}
+
+type QRInfo struct {
+	URL       string `json:"url"`
+	QrcodeKey string `json:"qrcode_key"`
+}
+
+type QRStatus struct {
+	URL          string `json:"string"`
+	RefreshToken string `json:"refresh_token"`
+	Code         int    `json:"code"`
+	Message      string `json:"message"`
+}
+
+const (
+	QR_NO_SCAN  = 86101 // 未扫码
+	QR_NO_CLICK = 86090 // 已扫码未确认
+	QR_EXPIRES  = 86038 // 已过期
+	QR_SUCCESS  = 0     // 已确认登录
+)
+
+// Dimension 视频分辨率
+type Dimension struct {
+	Width  int `json:"width"`
+	Height int `json:"height"`
+	Rotate int `json:"rotate"`
+}
+
+// StaffItem 视频人员
+type StaffItem struct {
+	Mid   int    `json:"mid"`
+	Title string `json:"title"`
+	Name  string `json:"name"`
+	Face  string `json:"face"`
+}
+
+// Page 分集信息
+type Page struct {
+	// 配合 Bvid 用于获取播放地址
+	Cid int `json:"cid"`
+	// 当前分集在合集中的序号，从 1 开始
+	Page int `json:"page"`
+	// 分集标题
+	Part string `json:"part"`
+	// 分集时长
+	Duration int `json:"duration"`
+	// 分集分辨率
+	Dimension `json:"dimension"`
+}
+
+// 通过 BVID 获取的视频信息
+type VideoInfo struct {
+	Bvid    string `json:"bvid"`
+	Aid     int    `json:"aid"`
+	Pic     string `json:"pic"`
+	Title   string `json:"title"`
+	Pubdate int    `json:"pubdate"`
+	Desc    string `json:"desc"`
+	Owner   struct {
+		Mid  int    `json:"mid"`
+		Name string `json:"name"`
+		Face string `json:"face"`
+	} `json:"owner"`
+	Dimension `json:"dimension"`
+	Staff     []StaffItem `json:"staff"`
+	Pages     []Page      `json:"pages"`
+	Duration  int         `json:"duration"`
+	Stat      struct {
+		Aid      int `json:"aid"`
+		View     int `json:"view"`     // 播放数量
+		Danmaku  int `json:"danmaku"`  // 弹幕数量
+		Reply    int `json:"reply"`    // 评论数量
+		Favorite int `json:"favorite"` // 收藏数量
+		Coin     int `json:"coin"`     // 投币数量
+		Share    int `json:"share"`    // 转发数量
+		NowRank  int `json:"now_rank"` // 当前排名
+		HisRank  int `json:"his_rank"` // 历史最高排名
+		Like     int `json:"like"`     // 点赞数量
+		Dislike  int `json:"dislike"`  // 不喜欢
+	} `json:"stat"`
+	UgcSeason struct {
+		Sections []struct {
+			Title    string `json:"title"`
+			Episodes []struct {
+				Title string `json:"title"`
+				Pages []Page `json:"pages"`
+				Bvid  string `json:"bvid"`
+			} `json:"episodes"`
+		} `json:"sections"`
+		Title string `json:"title"`
+	} `json:"ugc_season"`
+}
+
+// EpisodeInBV 通过 BV 获取的视频信息中的合集信息
+type EpisodeInBV struct {
+	Aid       int                `json:"aid"`
+	Bvid      string             `json:"bvid"`
+	Cid       int                `json:"cid"`
+	Pic       string             `json:"pic"` // 封面
+	Dimension `json:"dimension"` // 分辨率
+	Duration  int                `json:"duration"` // 时长
+	EPID      int                `json:"ep_id"`
+	LongTitle string             `json:"long_title"` // 分集完整标题，比如【法外狂徒张三现身！】
+	PubTime   int                `json:"pub_time"`   // 发布时间
+	Title     string             `json:"title"`      // 分集简略标题，比如【1】
+}
+
+// Episode 剧集分集信息
+type Episode struct {
+	Aid       int                `json:"aid"`
+	Bvid      string             `json:"bvid"`
+	Cid       int                `json:"cid"`
+	Cover     string             `json:"cover"` // 封面
+	Dimension `json:"dimension"` // 分辨率
+	Duration  int                `json:"duration"` // 时长
+	EPID      int                `json:"ep_id"`
+	LongTitle string             `json:"long_title"` // 分集完整标题，比如【法外狂徒张三现身！】
+	PubTime   int                `json:"pub_time"`   // 发布时间
+	Title     string             `json:"title"`      // 分集简略标题，比如【1】
+}
+
+// 通过 EPID 获取的视频信息
+type SeasonInfo struct {
+	Actors string `json:"actors"` // 演员名单
+	Areas  []struct {
+		ID   int    `json:"id"`
+		Name string `json:"name"`
+	} `json:"areas"` // 地区列表
+	Cover    string `json:"cover"`    // 封面
+	Evaluate string `json:"evaluate"` // 简介
+	Publish  struct {
+		IsFinish int    `json:"is_finish"` // 是否完结
+		PubTime  string `json:"pub_time"`  // 发布时间
+	} `json:"publish"`
+	SeasonID    int    `json:"season_id"`    // 剧集编号
+	SeasonTitle string `json:"season_title"` // 剧集标题
+	Stat        struct {
+		Coins     int `json:"coins"`     // 投币数量
+		Danmakus  int `json:"danmakus"`  // 弹幕数量
+		Favorite  int `json:"favorite"`  // 收藏数量
+		Favorites int `json:"favorites"` // 追剧数量
+		Likes     int `json:"likes"`     // 点赞数量
+		Reply     int `json:"reply"`     // 评论数量
+		Share     int `json:"share"`     // 分享数量
+		Views     int `json:"views"`     // 播放数量
+	} `json:"stat"`
+	Styles []string `json:"styles"` // 剧集内容类型，例如 [ "短剧", "奇幻", "搞笑" ]
+	Title  string   `json:"title"`  // 剧集标题
+	Total  int      `json:"total"`  // 总集数
+
+	Episodes []Episode `json:"episodes"` // 分集信息列表
+
+	NewEp struct {
+		Desc  string `json:"desc"`   // 更新状态文本
+		IsNew int    `json:"is_new"` // 是否是连载，0 为完结，1 为连载
+	} `json:"new_ep"`
+
+	Section []struct {
+		Title    string    `json:"title"`
+		Episodes []Episode `json:"episodes"`
+	} `json:"section"`
+}
+
+type PlayInfo struct {
+	AcceptDescription []string             `json:"accept_description"`
+	AcceptQuality     []common.MediaFormat `json:"accept_quality"`
+	SupportFormats    []struct {
+		Quality        common.MediaFormat `json:"quality"`
+		Format         string             `json:"format"`
+		NewDescription string             `json:"new_description"`
+		Codecs         []string           `json:"codecs"`
+	} `json:"support_formats"`
+	Dash *Dash `json:"dash"`
+}
+
+type Dash struct {
+	// 视频时长（秒）
+	Duration int     `json:"duration"`
+	Video    []Media `json:"video"`
+	Audio    []Media `json:"audio"`
+	Flac     *struct {
+		Audio Media `json:"audio"`
+	} `json:"flac"`
+}
+
+type Media struct {
+	ID        common.MediaFormat `json:"id"`
+	BaseURL   string             `json:"baseUrl"`
+	BackupURL []string           `json:"backupUrl"`
+	Bandwidth int                `json:"bandwidth"`
+	MimeType  string             `json:"mimeType"`
+	Codecs    string             `json:"codecs"`
+	Width     int                `json:"width"`
+	Height    int                `json:"height"`
+	FrameRate string             `json:"frameRate"`
+	Codecid   int                `json:"codecid"`
+}
+
+type FavList []struct {
+	Title    string `json:"title"`
+	Cover    string `json:"cover"`
+	Intro    string `json:"intro"`
+	Duration int    `json:"duration"`
+	Upper    struct {
+		Mid  int    `json:"mid"`
+		Name string `json:"name"`
+		Face string `json:"face"`
+	} `json:"upper"`
+	PubTime int    `json:"pubtime"`
+	Bvid    string `json:"bvid"`
+	Ugc     struct {
+		FirstCid int `json:"first_cid"`
+	} `json:"ugc"`
+}
@@ -0,0 +1,228 @@
+package bilibili
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math/rand"
+	"strconv"
+	"strings"
+)
+
+// GetBVInfo 根据 BVID 获取视频信息
+func (client *BiliClient) GetVideoInfo(bvid string) (*VideoInfo, error) {
+	if client.SESSDATA == "" {
+		return nil, errors.New("SESSDATA 不能为空")
+	}
+	params := map[string]string{"bvid": bvid}
+	response, err := client.SimpleGET("https://api.bilibili.com/x/web-interface/wbi/view", params)
+	if err != nil {
+		return nil, err
+	}
+	body := BaseResV2{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, err
+	}
+	if body.Code != 0 {
+		return nil, errors.New(body.Message)
+	}
+	bvInfo := VideoInfo{}
+	err = json.Unmarshal(body.Data, &bvInfo)
+	if err != nil {
+		return nil, err
+	}
+	return &bvInfo, nil
+}
+
+// GetSeasonInfo 根据 EPID 或 SSID 获取剧集信息
+func (client *BiliClient) GetSeasonInfo(epid int, ssid int) (*SeasonInfo, error) {
+	if client.SESSDATA == "" {
+		return nil, errors.New("SESSDATA 不能为空")
+	}
+	params := map[string]string{
+		"ep_id":     strconv.Itoa(epid),
+		"season_id": strconv.Itoa(ssid),
+	}
+	response, err := client.SimpleGET("https://api.bilibili.com/pgc/view/web/season", params)
+	if err != nil {
+		return nil, err
+	}
+	body := BaseResV3{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, err
+	}
+	if body.Code != 0 {
+		return nil, errors.New(body.Message)
+	}
+	seasonInfo := SeasonInfo{}
+	err = json.Unmarshal(body.Result, &seasonInfo)
+	if err != nil {
+		return nil, err
+	}
+	return &seasonInfo, nil
+}
+
+// GetPlayInfo 根据 BVID 和 CID 获取视频播放信息
+func (client *BiliClient) GetPlayInfo(bvid string, cid int) (*PlayInfo, error) {
+	if client.SESSDATA == "" {
+		return nil, errors.New("SESSDATA 不能为空")
+	}
+	params := map[string]string{
+		"bvid":  bvid,
+		"cid":   strconv.Itoa(cid),
+		"fnval": "4048",
+		"fnver": "0",
+		"fourk": "1",
+	}
+	response, err := client.SimpleGET("https://api.bilibili.com/x/player/playurl", params)
+	if err != nil {
+		return nil, err
+	}
+	body := BaseResV2{}
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, err
+	}
+	if body.Code != 0 {
+		return nil, errors.New(body.Message)
+	}
+	playInfo := PlayInfo{}
+	err = json.Unmarshal(body.Data, &playInfo)
+	if err != nil {
+		return nil, err
+	}
+	return &playInfo, nil
+}
+
+func (client *BiliClient) GetPopularVideos() ([]VideoInfo, error) {
+	if client.SESSDATA == "" {
+		return nil, errors.New("SESSDATA 不能为空")
+	}
+	urls := []string{
+		"https://api.bilibili.com/x/web-interface/popular",
+		"https://api.bilibili.com/x/web-interface/popular/precious",
+		"https://api.bilibili.com/x/web-interface/ranking/v2",
+	}
+	response, err := client.SimpleGET(urls[rand.Intn(len(urls))], nil)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+
+	err = json.NewDecoder(response.Body).Decode(&body)
+	if err != nil {
+		return nil, err
+	}
+	if body.Code != 0 {
+		return nil, errors.New(body.Message)
+	}
+	data := struct {
+		List []VideoInfo `json:"list"`
+	}{}
+
+	err = json.Unmarshal(body.Data, &data)
+	if err != nil {
+		return nil, err
+	}
+	return data.List, nil
+}
+
+// GetSeasonsArchivesList 获取合集中的第一个视频的 BVID
+func (client *BiliClient) GetSeasonsArchivesListFirstBvid(mid int, seasonId int) (string, error) {
+	url := "https://api.bilibili.com/x/polymer/web-space/seasons_archives_list"
+	params := map[string]string{
+		"mid":       strconv.Itoa(mid),
+		"season_id": strconv.Itoa(seasonId),
+		"page_num":  "1",
+		"page_size": "1",
+	}
+
+	response, err := client.SimpleGET(url, params)
+	if err != nil {
+		return "", err
+	}
+	defer response.Body.Close()
+
+	body := BaseResV2{}
+	if err = json.NewDecoder(response.Body).Decode(&body); err != nil {
+		return "", err
+	}
+	if body.Code != 0 {
+		return "", errors.New(body.Message)
+	}
+	var data struct {
+		Archives []struct {
+			Bvid string `json:"bvid"`
+		} `json:"archives"`
+	}
+	if err = json.Unmarshal(body.Data, &data); err != nil {
+		return "", nil
+	}
+	if len(data.Archives) == 0 {
+		return "", errors.New("视频列表为空")
+	}
+	return data.Archives[0].Bvid, nil
+}
+
+func (client *BiliClient) GetFavlist(mediaId int) (*FavList, error) {
+	if client.SESSDATA == "" {
+		return nil, errors.New("SESSDATA 不能为空")
+	}
+	page := 0
+	retry := 0
+	allFavList := FavList{}
+	for {
+		favList, hasMore, err := client.GetFavlistByPage(mediaId, page, 40)
+		if err != nil {
+			fmt.Println(err.Error())
+			if retry == 5 || strings.HasPrefix(err.Error(), "body.Code not 0") {
+				return nil, err
+			}
+			retry++
+			continue
+		}
+		allFavList = append(allFavList, *favList...)
+		if !hasMore {
+			break
+		}
+		page++
+	}
+	return &allFavList, nil
+}
+
+func (client *BiliClient) GetFavlistByPage(mediaId int, page int, pageSize int) (favlist *FavList, hasMore bool, err error) {
+	if client.SESSDATA == "" {
+		return nil, false, errors.New("SESSDATA 不能为空")
+	}
+	response, err := client.SimpleGET("https://api.bilibili.com/x/v3/fav/resource/list", map[string]string{
+		"media_id": strconv.Itoa(mediaId),
+		"pn":       strconv.Itoa(page + 1),
+		"ps":       strconv.Itoa(pageSize),
+		"order":    "mtime",
+		"type":     "0",
+		"tid":      "0",
+		"platform": "web",
+	})
+	if err != nil {
+		return nil, false, err
+	}
+	defer response.Body.Close()
+	body := BaseResV2{}
+	if err = json.NewDecoder(response.Body).Decode(&body); err != nil {
+		return nil, false, err
+	}
+	if body.Code != 0 {
+		return nil, false, fmt.Errorf("body.Code not 0, %s", body.Message)
+	}
+	data := struct {
+		Medias  FavList `json:"medias"`
+		HasMore bool    `json:"has_more"`
+	}{}
+	if err = json.Unmarshal(body.Data, &data); err != nil {
+		return nil, false, err
+	}
+	return &data.Medias, data.HasMore, nil
+}
@@ -0,0 +1,87 @@
+package bilibili
+
+import (
+	"bilidown/util"
+	"database/sql"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var MIXIN_KEY_ENC_TAB = []int{
+	46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35,
+	27, 43, 5, 49, 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13,
+	37, 48, 7, 16, 24, 55, 40, 61, 26, 17, 0, 1, 60, 51, 30, 4,
+	22, 25, 54, 21, 56, 59, 6, 63, 57, 62, 11, 36, 20, 34, 44, 52,
+}
+
+// GetWebKey 获取最新可用的 WbiKey，自动刷新缓存
+func (client *BiliClient) getWbiKey(db *sql.DB) (wbiKey string, err error) {
+	wbiKey, err = getWbiKeyFromDB(db)
+	if err != nil {
+		return "", err
+	}
+	if wbiKey == "" {
+		// 更新数据库中的 WebKey
+		wbiKey, err = client.getWbiKeyRemote()
+		if err != nil {
+			return "", err
+		}
+		if err = saveWbiKey(db, wbiKey); err != nil {
+			return "", err
+		}
+	}
+	return wbiKey, nil
+}
+
+func (client *BiliClient) GetMixinKey(db *sql.DB) (string, error) {
+	wbiKey, err := client.getWbiKey(db)
+	if err != nil {
+		return "", err
+	}
+	var result string
+	for _, index := range MIXIN_KEY_ENC_TAB {
+		result += string(wbiKey[index])
+	}
+	return result[:32], nil
+}
+
+func WbiSign(params map[string]string, mixinKey string) url.Values {
+	values := url.Values{}
+	for key, value := range params {
+		values.Set(key, value)
+	}
+	wts := strconv.FormatInt(time.Now().Unix(), 10)
+	values.Set("wts", wts)
+	encodeStr := strings.ReplaceAll(values.Encode(), "+", "%20") + mixinKey
+	w_rid := util.MD5Hash(encodeStr)
+	values.Set("w_rid", w_rid)
+	return values
+}
+
+// GetWbiKey 从数据库中获取 wbiKey，如果数据库中不存在记录或记录过期，则返回空字符串但不返回错误
+func getWbiKeyFromDB(db *sql.DB) (wbiKey string, err error) {
+	fields, err := util.GetFields(db, "wbi_key", "wbi_key_update_at")
+	if err != nil {
+		return "", err
+	}
+	// 获取上次更新时间的时间戳，单位是秒
+	updateAt, err := strconv.ParseInt(fields["wbi_key_update_at"], 10, 64)
+	if err != nil {
+		return "", nil
+	}
+	// 注意 key_update_at 单位是秒，判断上次刷新时间是否超过 1 天
+	if time.Now().Unix()-updateAt > 24*60*60 {
+		return "", nil
+	}
+	return fields["wbi_key"], nil
+}
+
+// SaveWbiKey 保存 imgKey 和 subKey 到数据库
+func saveWbiKey(db *sql.DB, wbiKey string) error {
+	return util.SaveFields(db, [][2]string{
+		{"wbi_key", wbiKey},
+		{"wbi_key_update_at", strconv.FormatInt(time.Now().Unix(), 10)},
+	})
+}
@@ -0,0 +1,71 @@
+package bilibili
+
+import (
+	"bilidown/util"
+	"fmt"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestGetWbiKey(t *testing.T) {
+	db := util.MustGetDB("../data.db")
+	defer db.Close()
+	sessdata, err := GetSessdata(db)
+	if err != nil {
+		t.Error(err)
+	}
+	client := BiliClient{SESSDATA: sessdata}
+	mixinKey, err := client.GetMixinKey(db)
+	if err != nil {
+		t.Error(err)
+	}
+	fmt.Println(mixinKey)
+}
+
+func TestTime(t *testing.T) {
+	fmt.Println(time.Now().Unix())
+}
+
+func TestURLEncode(t *testing.T) {
+	str := url.Values{
+		"foo": {"one one four"},
+		"bar": {"五一四"},
+		"baz": {"1919810"},
+	}.Encode()
+	str = strings.ReplaceAll(str, "+", "%20")
+	fmt.Println(str)
+}
+
+func TestWbiSign(t *testing.T) {
+	db := util.MustGetDB("../data.db")
+	defer db.Close()
+	sessdata, err := GetSessdata(db)
+	if err != nil {
+		t.Error(err)
+	}
+	client := BiliClient{SESSDATA: sessdata}
+	mixinKey, err := client.GetMixinKey(db)
+	if err != nil {
+		t.Error(err)
+	}
+	newParams := WbiSign(map[string]string{
+		"dm_cover_img_str": "QU5HTEUgKEludGVsLCBJbnRlbChSKSBJcmlzKFIpIFhlIEdyYXBoaWNzICgweDAwMDA5QTQ5KSBEaXJlY3QzRDExIHZzXzVfMCBwc181XzAsIEQzRDExKUdvb2dsZSBJbmMuIChJbnRlbC",
+		"dm_img_inter":     `{"ds":[{"t":10,"c":"YmUtcGFnZXItaXRlbSBiZS1wYWdlci1pdGVtLWFjdGl2ZQ","p":[330,110,110],"s":[179,179,358]}],"wh":[5762,6704,10],"of":[318,636,318]}`,
+		"dm_img_list":      `[{"x":1847,"y":-1616,"z":0,"timestamp":2486463,"k":70,"type":0},{"x":1972,"y":-1005,"z":24,"timestamp":2486563,"k":120,"type":0},{"x":2564,"y":-638,"z":72,"timestamp":2486665,"k":107,"type":0},{"x":4200,"y":-753,"z":199,"timestamp":2486765,"k":91,"type":0},{"x":4922,"y":-73,"z":426,"timestamp":2486865,"k":106,"type":0},{"x":4656,"y":-512,"z":35,"timestamp":2486965,"k":94,"type":0},{"x":4942,"y":-590,"z":79,"timestamp":2487066,"k":126,"type":0},{"x":5200,"y":-414,"z":123,"timestamp":2487167,"k":60,"type":0},{"x":4916,"y":-820,"z":228,"timestamp":2563922,"k":111,"type":0},{"x":5004,"y":-50,"z":570,"timestamp":2564022,"k":110,"type":0},{"x":4784,"y":330,"z":666,"timestamp":2564122,"k":98,"type":0},{"x":5029,"y":767,"z":956,"timestamp":2564223,"k":115,"type":0},{"x":5327,"y":1400,"z":1307,"timestamp":2564324,"k":107,"type":0},{"x":4598,"y":671,"z":578,"timestamp":2564424,"k":125,"type":0},{"x":5228,"y":1283,"z":1193,"timestamp":2564525,"k":83,"type":0},{"x":5210,"y":932,"z":978,"timestamp":2564625,"k":66,"type":0},{"x":5034,"y":195,"z":484,"timestamp":2564725,"k":112,"type":0},{"x":6496,"y":1467,"z":1849,"timestamp":2564825,"k":83,"type":0},{"x":6592,"y":1387,"z":1852,"timestamp":2564929,"k":122,"type":0},{"x":6001,"y":728,"z":1235,"timestamp":2565030,"k":95,"type":0},{"x":6666,"y":1393,"z":1900,"timestamp":2627309,"k":121,"type":1},{"x":5486,"y":5603,"z":2283,"timestamp":2627842,"k":102,"type":0},{"x":5269,"y":4186,"z":1733,"timestamp":2627947,"k":117,"type":0},{"x":4439,"y":3174,"z":897,"timestamp":2628056,"k":117,"type":0},{"x":5231,"y":3959,"z":1687,"timestamp":2628268,"k":79,"type":0},{"x":6197,"y":4786,"z":2587,"timestamp":2628368,"k":96,"type":0},{"x":4667,"y":3298,"z":724,"timestamp":2628470,"k":91,"type":0},{"x":4658,"y":3436,"z":205,"timestamp":2629433,"k":88,"type":0},{"x":5380,"y":3443,"z":1117,"timestamp":2630390,"k":121,"type":0},{"x":5559,"y":2678,"z":1920,"timestamp":2630492,"k":116,"type":0},{"x":5517,"y":2465,"z":2023,"timestamp":2630634,"k":86,"type":0},{"x":6584,"y":3533,"z":3087,"timestamp":2630782,"k":96,"type":0},{"x":6183,"y":3242,"z":2839,"timestamp":2630892,"k":103,"type":0},{"x":6277,"y":580,"z":1449,"timestamp":2663911,"k":68,"type":0},{"x":7556,"y":3077,"z":3053,"timestamp":2664013,"k":114,"type":0},{"x":5321,"y":1642,"z":1201,"timestamp":2664114,"k":104,"type":0},{"x":5839,"y":2261,"z":1761,"timestamp":2664215,"k":72,"type":0},{"x":6303,"y":2726,"z":2222,"timestamp":2664317,"k":93,"type":0},{"x":7553,"y":4255,"z":3532,"timestamp":2664420,"k":104,"type":0},{"x":7677,"y":4381,"z":3650,"timestamp":2664521,"k":119,"type":0},{"x":8184,"y":4762,"z":4098,"timestamp":2664622,"k":122,"type":0},{"x":4555,"y":740,"z":406,"timestamp":2664722,"k":118,"type":0},{"x":4305,"y":241,"z":75,"timestamp":2664822,"k":105,"type":0},{"x":6373,"y":2218,"z":2117,"timestamp":2664934,"k":110,"type":0},{"x":6079,"y":1757,"z":1680,"timestamp":2665036,"k":90,"type":0},{"x":8158,"y":3462,"z":3524,"timestamp":2665136,"k":100,"type":0},{"x":9312,"y":4205,"z":4531,"timestamp":2665236,"k":124,"type":0},{"x":5306,"y":89,"z":487,"timestamp":2665337,"k":89,"type":0},{"x":9721,"y":4399,"z":4941,"timestamp":2665437,"k":100,"type":0},{"x":9058,"y":3727,"z":4282,"timestamp":2665540,"k":107,"type":0}]`,
+		"dm_img_str":       "V2ViR0wgMS4wIChPcGVuR0wgRVMgMi4wIENocm9taXVtKQ",
+		"keyword":          "",
+		"mid":              "596866446",
+		"order":            "pubdate",
+		"order_avoided":    "true",
+		"platform":         "web",
+		"pn":               "3",
+		"ps":               "30",
+		"tid":              "0",
+		"w_webid":          "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzcG1faWQiOiIwLjAiLCJidXZpZCI6IjBGRTlGRDMxLTZGQTQtRjU2RC1GQjEwLUI4OTg2ODUyRUZDNzUwMDUyaW5mb2MiLCJ1c2VyX2FnZW50IjoiTW96aWxsYS81LjAgKFdpbmRvd3MgTlQgMTAuMDsgV2luNjQ7IHg2NCkgQXBwbGVXZWJLaXQvNTM3LjM2IChLSFRNTCwgbGlrZSBHZWNrbykgQ2hyb21lLzEzMS4wLjAuMCBTYWZhcmkvNTM3LjM2IEVkZy8xMzEuMC4wLjAiLCJidXZpZF9mcCI6IjY3YzZkNzg2NTgyYzQ2OGYwNjRiZTE5MTk2OWU4ZWE4IiwiYmlsaV90aWNrZXQiOiI4ODA0MDgzYmYzZGQ1NGNkNzI4OWZjZDE0MmIwN2U4ZCIsImNyZWF0ZWRfYXQiOjE3MzI0NzE3MTIsInR0bCI6ODY0MDAsInVybCI6Ii81OTY4NjY0NDYvdmlkZW8_dGlkPTBcdTAwMjZwbj0yXHUwMDI2a2V5d29yZD1cdTAwMjZvcmRlcj1wdWJkYXRlIiwicmVzdWx0Ijoibm9ybWFsIiwiaXNzIjoiZ2FpYSIsImlhdCI6MTczMjQ3MTcxMn0.pTVyhdRcB2VFcXqeYoi3TjnlEFLAXMpNNJK-dW9Gq3vqBL4YldGgZBuGBXXF7Ldwg_vW6TQg6pQCQ7vz357ws2Z9g2-kLIuNmR3j8oMg2zAXAND1q5oJNw0jNnevhLlB8_vOcip0eIJSHRjqbPbNShKLOcSnSfLaiI64EHwjRFAOEPYVw3evLXKB4TFnxSRi1WDSI684TfNrXp0_2yTJvuPheHQmQC1NcUP_P9tqTuRiDy3YfkuR8PlRcQxmKHVs-byObL5WEPqMMQa8b8zidRtzEkbGV7ra8gTgv1HwgpSDi_Y1VNsX2WtNcBPTSwURWc7zREf-RJqruzgcf1ErpA",
+		"web_location":     "1550101",
+	}, mixinKey)
+
+	fmt.Println(newParams.Encode())
+}
@@ -0,0 +1,14 @@
+package common
+
+import (
+	"crypto/rand"
+	"fmt"
+)
+
+func RandomString(length int) string {
+	randomBytes := make([]byte, length)
+	rand.Read(randomBytes)
+	return fmt.Sprintf("%x", randomBytes)[:length]
+}
+
+type MediaFormat int
@@ -0,0 +1,41 @@
+module bilidown
+
+go 1.23.0
+
+require (
+	github.com/getlantern/systray v1.2.2
+	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
+	modernc.org/sqlite v1.33.1
+)
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/getlantern/context v0.0.0-20220418194847-3d5e7a086201 // indirect
+	github.com/getlantern/errors v1.0.4 // indirect
+	github.com/getlantern/golog v0.0.0-20230503153817-8e72de7e0a65 // indirect
+	github.com/getlantern/hex v0.0.0-20220104173244-ad7e4b9194dc // indirect
+	github.com/getlantern/hidden v0.0.0-20220104173330-f221c5a24770 // indirect
+	github.com/getlantern/ops v0.0.0-20231025133620-f368ab734534 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-stack/stack v1.8.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	go.opentelemetry.io/otel v1.31.0 // indirect
+	go.opentelemetry.io/otel/metric v1.31.0 // indirect
+	go.opentelemetry.io/otel/trace v1.31.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
+	golang.org/x/exp v0.0.0-20231108232855-2478ac86f678 // indirect
+	golang.org/x/sys v0.26.0 // indirect
+	modernc.org/gc/v3 v3.0.0-20241004144649-1aea3fae8852 // indirect
+	modernc.org/libc v1.61.0 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.8.0 // indirect
+	modernc.org/strutil v1.2.0 // indirect
+	modernc.org/token v1.1.0 // indirect
+)
@@ -0,0 +1,164 @@
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+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/Knetic/govaluate.v3 v3.0.0/go.mod h1:csKLBORsPbafmSCGTEh3U7Ozmsuq8ZSIlKk1bcqph0E=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/cc/v4 v4.21.4 h1:3Be/Rdo1fpr8GrQ7IVw9OHtplU4gWbb+wNgeoBMmGLQ=
+modernc.org/cc/v4 v4.21.4/go.mod h1:HM7VJTZbUCR3rV8EYBi9wxnJ0ZBRiGE5OeGXNA0IsLQ=
+modernc.org/ccgo/v4 v4.21.0 h1:kKPI3dF7RIag8YcToh5ZwDcVMIv6VGa0ED5cvh0LMW4=
+modernc.org/ccgo/v4 v4.21.0/go.mod h1:h6kt6H/A2+ew/3MW/p6KEoQmrq/i3pr0J/SiwiaF/g0=
+modernc.org/fileutil v1.3.0 h1:gQ5SIzK3H9kdfai/5x41oQiKValumqNTDXMvKo62HvE=
+modernc.org/fileutil v1.3.0/go.mod h1:XatxS8fZi3pS8/hKG2GH/ArUogfxjpEKs3Ku3aK4JyQ=
+modernc.org/gc/v2 v2.5.0 h1:bJ9ChznK1L1mUtAQtxi0wi5AtAs5jQuw4PrPHO5pb6M=
+modernc.org/gc/v2 v2.5.0/go.mod h1:wzN5dK1AzVGoH6XOzc3YZ+ey/jPgYHLuVckd62P0GYU=
+modernc.org/gc/v3 v3.0.0-20241004144649-1aea3fae8852 h1:IYXPPTTjjoSHvUClZIYexDiO7g+4x+XveKT4gCIAwiY=
+modernc.org/gc/v3 v3.0.0-20241004144649-1aea3fae8852/go.mod h1:Qz0X07sNOR1jWYCrJMEnbW/X55x206Q7Vt4mz6/wHp4=
+modernc.org/libc v1.61.0 h1:eGFcvWpqlnoGwzZeZe3PWJkkKbM/3SUGyk1DVZQ0TpE=
+modernc.org/libc v1.61.0/go.mod h1:DvxVX89wtGTu+r72MLGhygpfi3aUGgZRdAYGCAVVud0=
+modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
+modernc.org/mathutil v1.6.0/go.mod h1:Ui5Q9q1TR2gFm0AQRqQUaBWFLAhQpCwNcuhBOSedWPo=
+modernc.org/memory v1.8.0 h1:IqGTL6eFMaDZZhEWwcREgeMXYwmW83LYW8cROZYkg+E=
+modernc.org/memory v1.8.0/go.mod h1:XPZ936zp5OMKGWPqbD3JShgd/ZoQ7899TUuQqxY+peU=
+modernc.org/opt v0.1.3 h1:3XOZf2yznlhC+ibLltsDGzABUGVx8J6pnFMS3E4dcq4=
+modernc.org/opt v0.1.3/go.mod h1:WdSiB5evDcignE70guQKxYUl14mgWtbClRi5wmkkTX0=
+modernc.org/sortutil v1.2.0 h1:jQiD3PfS2REGJNzNCMMaLSp/wdMNieTbKX920Cqdgqc=
+modernc.org/sortutil v1.2.0/go.mod h1:TKU2s7kJMf1AE84OoiGppNHJwvB753OYfNl2WRb++Ss=
+modernc.org/sqlite v1.33.1 h1:trb6Z3YYoeM9eDL1O8do81kP+0ejv+YzgyFo+Gwy0nM=
+modernc.org/sqlite v1.33.1/go.mod h1:pXV2xHxhzXZsgT/RtTFAPY6JJDEvOTcTdwADQCCWD4k=
+modernc.org/strutil v1.2.0 h1:agBi9dp1I+eOnxXeiZawM8F4LawKv4NzGWSaLfyeNZA=
+modernc.org/strutil v1.2.0/go.mod h1:/mdcBmfOibveCTBxUl5B5l6W+TTH1FXPLHZE6bTosX0=
+modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
+modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
@@ -0,0 +1,226 @@
+package main
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"time"
+
+	"bilidown/router"
+	"bilidown/util"
+
+	"github.com/getlantern/systray"
+	_ "modernc.org/sqlite"
+)
+
+const (
+	HTTP_PORT = 8098      // 限定 HTTP 服务器端口
+	HTTP_HOST = ""        // 限定 HTTP 服务器主机
+	VERSION   = "v2.1.1" // 软件版本号，将影响托盘标题显示
+)
+
+var urlLocal = fmt.Sprintf("http://127.0.0.1:%d", HTTP_PORT)
+var urlLocalUnix = fmt.Sprintf("%s?___%d", urlLocal, time.Now().UnixMilli())
+
+func main() {
+	checkFFmpeg()
+	// 启动托盘程序
+	systray.Run(onReady, nil)
+}
+
+func onReady() {
+	// 设置托盘图标
+	setIcon()
+	// 设置托盘标题
+	setTitle()
+	// 设置托盘菜单
+	setMenuItem()
+	// 初始化数据表
+	mustInitTables()
+	// 配置和启动 HTTP 服务器
+	mustRunServer()
+	// 调用默认浏览器访问端口
+	time.Sleep(time.Millisecond * 1000)
+	openBrowser(urlLocalUnix)
+	// 保持运行
+	select {}
+}
+
+// checkFFmpeg 检测 ffmpeg 的安装情况，如果未安装则打印提示信息。
+func checkFFmpeg() {
+	if _, err := util.GetFFmpegPath(); err != nil {
+		fmt.Println("🚨 FFmpeg is missing. Install it from https://www.ffmpeg.org/download.html or place it in ./bin, then restart the application.")
+		select {}
+	}
+}
+
+// 配置和启动 HTTP 服务器
+func mustRunServer() {
+	// 前端打包文件
+	http.Handle("/", http.FileServer(http.Dir("static")))
+	// 后端接口服务
+	http.Handle("/api/", http.StripPrefix("/api", router.API()))
+	// 启动 HTTP 服务器
+	go func() {
+		err := http.ListenAndServe(fmt.Sprintf("%s:%d", HTTP_HOST, HTTP_PORT), nil)
+		if err != nil {
+			log.Fatal("http.ListenAndServe:", err)
+		}
+	}()
+}
+
+// openBrowser 调用系统默认浏览器打开指定 URL
+func openBrowser(url string) {
+	var cmd *exec.Cmd
+	switch runtime.GOOS {
+	case "windows":
+		cmd = exec.Command("rundll32", "url.dll,FileProtocolHandler", url)
+	case "darwin":
+		cmd = exec.Command("open", url)
+	case "linux":
+		cmd = exec.Command("xdg-open", url)
+	default:
+		log.Printf("openBrowser: %v.", errors.New("unsupported operating system"))
+	}
+	if err := cmd.Start(); err != nil {
+		log.Printf("openBrowser: %v.", err)
+	}
+	fmt.Printf("Opened in default browser: %s.\n", url)
+}
+
+// setIcon 设置托盘图标
+func setIcon() {
+	var path string
+	if runtime.GOOS == "windows" {
+		path = "static/favicon.ico"
+	} else {
+		path = "static/favicon-32x32.png"
+	}
+	systray.SetIcon(mustReadFile(path))
+}
+
+// mustReadFile 返回文件字节内容
+func mustReadFile(path string) []byte {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		log.Fatalln("os.ReadFile:", err)
+	}
+	return data
+}
+
+// setTitle 设置托盘标题和工具提示
+func setTitle() {
+	title := "Bilidown"
+	tooltip := fmt.Sprintf("%s 视频解析器 %s (port:%d)", title, VERSION, HTTP_PORT)
+	// only available on Mac and Windows.
+	systray.SetTooltip(tooltip)
+}
+
+// setMenuItem 设置托盘菜单
+func setMenuItem() {
+	openBrowserItemText := fmt.Sprintf("打开主界面 (port:%d)", HTTP_PORT)
+	openBrowserItem := systray.AddMenuItem(openBrowserItemText, openBrowserItemText)
+	go func() {
+		for {
+			<-openBrowserItem.ClickedCh
+			openBrowser(urlLocalUnix)
+		}
+	}()
+
+	aboutItemText := "Github 项目主页"
+	aboutItem := systray.AddMenuItem(aboutItemText, aboutItemText)
+	go func() {
+		for {
+			<-aboutItem.ClickedCh
+			openBrowser("https://github.com/iuroc/bilidown")
+		}
+	}()
+
+	exitItemText := "退出应用"
+	exitItem := systray.AddMenuItem(exitItemText, exitItemText)
+	go func() {
+		<-exitItem.ClickedCh
+		log.Printf("Bilidown has exited.")
+		systray.Quit()
+	}()
+}
+
+// mustInitTables 初始化数据表
+func mustInitTables() {
+	db := util.MustGetDB()
+	defer db.Close()
+
+	if _, err := db.Exec(`CREATE TABLE IF NOT EXISTS "field" (
+		"name" TEXT PRIMARY KEY NOT NULL,
+		"value" TEXT
+	)`); err != nil {
+		log.Fatalln("create table field:", err)
+	}
+
+	if _, err := db.Exec(`CREATE TABLE IF NOT EXISTS "log" (
+		"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+		"content" TEXT NOT NULL,
+		"create_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP
+	)`); err != nil {
+		log.Fatalln("create table log:", err)
+	}
+
+	if _, err := db.Exec(`CREATE TABLE IF NOT EXISTS "task" (
+		"id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+		"bvid" text NOT NULL,
+		"cid" integer NOT NULL,
+		"format" integer NOT NULL,
+		"title" text NOT NULL,
+		"owner" text NOT NULL,
+		"cover" text NOT NULL,
+		"status" text NOT NULL,
+		"folder" text NOT NULL,
+		"duration" integer NOT NULL,
+		"download_type" text NOT NULL DEFAULT 'merge',
+		"create_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP
+	)`); err != nil {
+		log.Fatalln("create table task:", err)
+	}
+
+	if _, err := util.GetCurrentFolder(db); err != nil {
+		log.Fatalln("util.GetCurrentFolder:", err)
+	}
+
+	if err := initHistoryTask(db); err != nil {
+		log.Fatalln("initHistoryTask:", err)
+	}
+
+	// 添加可能缺失的列（用于数据库迁移）
+	if err := addMissingColumns(db); err != nil {
+		log.Fatalln("addMissingColumns:", err)
+	}
+}
+
+// addMissingColumns 添加可能缺失的列（用于数据库迁移）
+func addMissingColumns(db *sql.DB) error {
+	// 检查download_type列是否存在，如果不存在则添加
+	// SQLite没有直接的方法检查列是否存在，我们尝试添加列并忽略错误
+	// 使用事务确保操作原子性
+	util.SqliteLock.Lock()
+	_, _ = db.Exec(`ALTER TABLE "task" ADD COLUMN "download_type" TEXT DEFAULT 'merge'`)
+	// 将现有记录中的NULL值更新为默认值'merge'
+	_, _ = db.Exec(`UPDATE "task" SET "download_type" = 'merge' WHERE "download_type" IS NULL`)
+	util.SqliteLock.Unlock()
+
+	// 忽略错误，因为列可能已经存在
+	// SQLite错误码为1表示列已存在
+	return nil
+}
+
+// initHistoryTask 将上一次程序运行时未完成的任务进度全部变为 error
+func initHistoryTask(db *sql.DB) error {
+	util.SqliteLock.Lock()
+	_, err := db.Exec(`UPDATE "task" SET "status" = 'error' WHERE "status" IN ('waiting', 'running')`)
+	util.SqliteLock.Unlock()
+	return err
+}
@@ -0,0 +1,102 @@
+package router
+
+import (
+	"encoding/base64"
+	"net/http"
+
+	"bilidown/bilibili"
+	"bilidown/util"
+
+	"github.com/skip2/go-qrcode"
+)
+
+func getQRInfo(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0")
+	client := bilibili.BiliClient{}
+	qrInfo, err := client.NewQRInfo()
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	imageData, err := qrcode.Encode(qrInfo.URL, qrcode.Medium, 256)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	base64Str := base64.StdEncoding.EncodeToString(imageData)
+	util.Res{
+		Success: true,
+		Message: "获取成功",
+		Data: struct {
+			Key   string `json:"key"`
+			Image string `json:"image"`
+		}{
+			Key:   qrInfo.QrcodeKey,
+			Image: "data:image/png;base64," + base64Str,
+		}}.Write(w)
+}
+
+func checkLogin(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0")
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		util.Res{Success: false, Message: "未登录"}.Write(w)
+		return
+	}
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	check, err := client.CheckLogin()
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	if check {
+		util.Res{Success: true, Message: "登录成功"}.Write(w)
+	} else {
+		util.Res{Success: false, Message: "登录失败"}.Write(w)
+	}
+}
+
+// getQRStatus 获取二维码状态
+func getQRStatus(w http.ResponseWriter, r *http.Request) {
+	if r.ParseForm() != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+
+	key := r.FormValue("key")
+	if key == "" {
+		util.Res{Success: false, Message: "key 不能为空"}.Write(w)
+		return
+	}
+	client := bilibili.BiliClient{}
+	qrStatus, sessdata, err := client.GetQRStatus(key)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	if qrStatus.Code != bilibili.QR_SUCCESS {
+		util.Res{Success: false, Message: qrStatus.Message}.Write(w)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	err = bilibili.SaveSessdata(db, sessdata)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "登录成功"}.Write(w)
+}
+
+func logout(w http.ResponseWriter, r *http.Request) {
+	db := util.MustGetDB()
+	defer db.Close()
+	err := bilibili.SaveSessdata(db, "")
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "退出成功"}.Write(w)
+}
@@ -0,0 +1,120 @@
+package router
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+
+	"bilidown/util"
+	"bilidown/util/res_error"
+)
+
+func API() *http.ServeMux {
+	router := http.NewServeMux()
+	router.HandleFunc("/getVideoInfo", getVideoInfo)
+	router.HandleFunc("/getSeasonInfo", getSeasonInfo)
+	router.HandleFunc("/getQRInfo", getQRInfo)
+	router.HandleFunc("/getQRStatus", getQRStatus)
+	router.HandleFunc("/checkLogin", checkLogin)
+	router.HandleFunc("/getPlayInfo", getPlayInfo)
+	router.HandleFunc("/createTask", createTask)
+	router.HandleFunc("/getActiveTask", getActiveTask)
+	router.HandleFunc("/getTaskList", getTaskList)
+	router.HandleFunc("/showFile", showFile)
+	router.HandleFunc("/getFields", getFields)
+	router.HandleFunc("/saveFields", saveFields)
+	router.HandleFunc("/logout", logout)
+	router.HandleFunc("/quit", quit)
+	router.HandleFunc("/getPopularVideos", getPopularVideos)
+	router.HandleFunc("/deleteTask", deleteTask)
+	router.HandleFunc("/getRedirectedLocation", getRedirectedLocation)
+	router.HandleFunc("/downloadVideo", downloadVideo)
+	router.HandleFunc("/getSeasonsArchivesListFirstBvid", getSeasonsArchivesListFirstBvid)
+	router.HandleFunc("/getFavList", getFavList)
+	return router
+}
+
+func getRedirectedLocation(w http.ResponseWriter, r *http.Request) {
+	if r.ParseForm() != nil {
+		res_error.Send(w, res_error.ParamError)
+		return
+	}
+	url := r.FormValue("url")
+	if !util.IsValidURL(url) {
+		res_error.Send(w, res_error.URLFormatError)
+		return
+	}
+	if location, err := util.GetRedirectedLocation(url); err != nil {
+		res_error.Send(w, res_error.NoLocationError)
+		return
+	} else {
+		util.Res{Success: true, Message: "获取成功", Data: location}.Write(w)
+		return
+	}
+}
+
+func quit(w http.ResponseWriter, r *http.Request) {
+	util.Res{Success: true, Message: "退出成功"}.Write(w)
+	go func() {
+		os.Exit(0)
+	}()
+}
+
+func getFields(w http.ResponseWriter, r *http.Request) {
+	db := util.MustGetDB()
+	defer db.Close()
+
+	fields, err := util.GetFields(db, util.FieldUtil{}.AllowSelect()...)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Data: fields}.Write(w)
+}
+
+func saveFields(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		util.Res{Success: false, Message: "不支持的请求方法"}.Write(w)
+		return
+	}
+	defer r.Body.Close()
+	var body [][2]string
+
+	err := json.NewDecoder(r.Body).Decode(&body)
+	if err != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+
+	db := util.MustGetDB()
+	defer db.Close()
+
+	fu := util.FieldUtil{}
+
+	for _, d := range body {
+		if !fu.IsAllowUpdate(d[0]) {
+			util.Res{Success: false, Message: fmt.Sprintf("字段 %s 不允许修改", d[0])}.Write(w)
+			return
+		}
+
+		if d[0] == "download_folder" {
+			if _, err := os.Stat(d[1]); os.IsNotExist(err) {
+				if err := os.MkdirAll(d[1], os.ModePerm); err != nil {
+					util.Res{Success: false, Message: fmt.Sprintf("目录创建失败：%s", d[1])}.Write(w)
+					return
+				}
+			} else if err != nil {
+				util.Res{Success: false, Message: fmt.Sprintf("路径设置失败：%v", err)}.Write(w)
+				return
+			}
+		}
+	}
+
+	err = util.SaveFields(db, body)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "保存成功"}.Write(w)
+}
@@ -0,0 +1,167 @@
+package router
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+
+	"bilidown/task"
+	"bilidown/util"
+)
+
+func createTask(w http.ResponseWriter, r *http.Request) {
+	defer r.Body.Close()
+	if r.Method != http.MethodPost {
+		util.Res{Success: false, Message: "不支持的请求方法"}.Write(w)
+		return
+	}
+	var body []task.TaskInDB
+	err := json.NewDecoder(r.Body).Decode(&body)
+	if err != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	for _, item := range body {
+		if !util.CheckBvidFormat(item.Bvid) {
+			util.Res{Success: false, Message: "bvid 格式错误"}.Write(w)
+			return
+		}
+		if item.Cover == "" || item.Title == "" || item.Owner == "" {
+			util.Res{Success: false, Message: "参数错误"}.Write(w)
+		}
+
+		if !util.IsValidURL(item.Cover) {
+			util.Res{Success: false, Message: "封面链接格式错误"}.Write(w)
+			return
+		}
+		if !util.IsValidURL(item.Audio) {
+			util.Res{Success: false, Message: "音频链接格式错误"}.Write(w)
+			return
+		}
+		if !util.IsValidURL(item.Video) {
+			util.Res{Success: false, Message: "视频链接格式错误"}.Write(w)
+			return
+		}
+		if !util.IsValidFormatCode(item.Format) {
+			util.Res{Success: false, Message: "清晰度代码错误"}.Write(w)
+			return
+		}
+		item.Folder, err = util.GetCurrentFolder(db)
+		item.Status = "waiting"
+		if err != nil {
+			util.Res{Success: false, Message: fmt.Sprintf("util.GetCurrentFolder: %v.", err)}.Write(w)
+			return
+		}
+		_task := task.Task{TaskInDB: item}
+		_task.Title = util.FilterFileName(_task.Title)
+		err = _task.Create(db)
+		if err != nil {
+			util.Res{Success: false, Message: fmt.Sprintf("_task.Create: %v.", err)}.Write(w)
+			return
+		}
+		go _task.Start()
+	}
+	util.Res{Success: true, Message: "创建成功"}.Write(w)
+}
+
+func getActiveTask(w http.ResponseWriter, r *http.Request) {
+	util.Res{Success: true, Data: task.GlobalTaskList}.Write(w)
+}
+
+func getTaskList(w http.ResponseWriter, r *http.Request) {
+	err := r.ParseForm()
+	if err != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	page, err := strconv.Atoi(r.FormValue("page"))
+	if err != nil {
+		page = 0
+	}
+	pageSize, err := strconv.Atoi(r.FormValue("pageSize"))
+	if err != nil {
+		pageSize = 360
+	}
+	tasks, err := task.GetTaskList(db, page, pageSize)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: tasks}.Write(w)
+}
+
+// showFile 调用 Explorer 查看文件位置
+func showFile(w http.ResponseWriter, r *http.Request) {
+	if err := r.ParseForm(); err != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+	filePath := r.FormValue("filePath")
+
+	var cmd *exec.Cmd
+
+	// 根据操作系统选择命令
+	switch runtime.GOOS {
+	case "windows":
+		// Windows 使用 explorer
+		cmd = exec.Command("explorer", "/select,", filePath)
+	case "darwin":
+		// macOS 使用 open
+		cmd = exec.Command("open", "-R", filePath)
+	case "linux":
+		// Linux 使用 xdg-open
+		cmd = exec.Command("xdg-open", filePath)
+	default:
+		util.Res{Success: false, Message: "不支持的操作系统"}.Write(w)
+		return
+	}
+	err := cmd.Start()
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "操作成功"}.Write(w)
+}
+
+func deleteTask(w http.ResponseWriter, r *http.Request) {
+	taskIDStr := r.FormValue("id")
+	taskID, err := strconv.Atoi(taskIDStr)
+	if err != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+
+	_task, err := task.GetTask(db, taskID)
+	if err == sql.ErrNoRows {
+		util.Res{Success: true, Message: "数据库中没有该条记录，所以本次操作被忽略，可以算作成功。"}.Write(w)
+		return
+	}
+	if err != nil {
+		util.Res{Success: false, Message: fmt.Sprintf("task.GetTask: %v", err)}.Write(w)
+		return
+	}
+	filePath := _task.FilePath()
+	err = os.Remove(filePath)
+	if err != nil && !os.IsNotExist(err) {
+		util.Res{Success: false, Message: fmt.Sprintf("文件删除失败 os.Remove: %v", err)}.Write(w)
+		return
+	}
+
+	err = task.DeleteTask(db, taskID)
+	if err != nil {
+		util.Res{Success: false, Message: fmt.Sprintf("task.DeleteTask: %v", err)}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "删除成功"}.Write(w)
+}
@@ -0,0 +1,182 @@
+package router
+
+import (
+	"fmt"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"bilidown/bilibili"
+	"bilidown/util"
+	"bilidown/util/res_error"
+)
+
+// getVideoInfo 通过 BV 号获取视频信息
+func getVideoInfo(w http.ResponseWriter, r *http.Request) {
+	if r.ParseForm() != nil {
+		res_error.Send(w, res_error.ParamError)
+		return
+	}
+	bvid := r.FormValue("bvid")
+	if !util.CheckBvidFormat(bvid) {
+		res_error.Send(w, res_error.BvidFormatError)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		res_error.Send(w, res_error.NotLogin)
+		return
+	}
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	videoInfo, err := client.GetVideoInfo(bvid)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: videoInfo}.Write(w)
+}
+
+// getSeasonInfo 通过 EP 号或 SS 号获取视频信息
+func getSeasonInfo(w http.ResponseWriter, r *http.Request) {
+	if r.ParseForm() != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+	var epid int
+	epid, err := strconv.Atoi(r.FormValue("epid"))
+	if r.FormValue("epid") != "" && err != nil {
+		util.Res{Success: false, Message: "epid 格式错误"}.Write(w)
+		return
+	}
+	var ssid int
+	if epid == 0 {
+		ssid, err = strconv.Atoi(r.FormValue("ssid"))
+		if r.FormValue("ssid") != "" && err != nil {
+			util.Res{Success: false, Message: "ssid 格式错误"}.Write(w)
+			return
+		}
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		res_error.Send(w, res_error.NotLogin)
+		return
+	}
+
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	seasonInfo, err := client.GetSeasonInfo(epid, ssid)
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: seasonInfo}.Write(w)
+}
+
+// getPlayInfo 通过 BVID 和 CID 获取视频播放信息
+func getPlayInfo(w http.ResponseWriter, r *http.Request) {
+	if r.ParseForm() != nil {
+		util.Res{Success: false, Message: "参数错误"}.Write(w)
+		return
+	}
+
+	bvid := r.FormValue("bvid")
+	if !util.CheckBvidFormat(bvid) {
+		util.Res{Success: false, Message: "bvid 格式错误"}.Write(w)
+		return
+	}
+	cid, err := strconv.Atoi(r.FormValue("cid"))
+	if err != nil {
+		util.Res{Success: false, Message: "cid 格式错误"}.Write(w)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		res_error.Send(w, res_error.NotLogin)
+		return
+	}
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	playInfo, err := client.GetPlayInfo(bvid, cid)
+	if err != nil {
+		util.Res{Success: false, Message: fmt.Sprintf("client.GetPlayInfo: %v", err)}.Write(w)
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: playInfo}.Write(w)
+}
+
+func getPopularVideos(w http.ResponseWriter, r *http.Request) {
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		res_error.Send(w, res_error.NotLogin)
+		return
+	}
+
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	videos, err := client.GetPopularVideos()
+	if err != nil {
+		util.Res{Success: false, Message: err.Error()}.Write(w)
+		return
+	}
+	bvidList := make([]string, 0)
+	for _, v := range videos {
+		bvidList = append(bvidList, v.Bvid)
+	}
+	util.Res{Success: true, Message: "获取成功", Data: bvidList}.Write(w)
+}
+
+var downloadVideo = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	path := r.URL.Query().Get("path")
+	safePath := filepath.Clean(path)
+	safePath = strings.ReplaceAll(safePath, "\\", "/")
+	http.ServeFile(w, r, safePath)
+})
+
+var getSeasonsArchivesListFirstBvid = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	var mid int
+	var seasonId int
+	var err error
+	if mid, err = strconv.Atoi(r.URL.Query().Get("mid")); err != nil {
+		res_error.Send(w, res_error.MidFormatError)
+		return
+	}
+	if seasonId, err = strconv.Atoi(r.URL.Query().Get("seasonId")); err != nil {
+		res_error.Send(w, res_error.SeasonIdFormatError)
+		return
+	}
+	client := bilibili.BiliClient{}
+	bvid, err := client.GetSeasonsArchivesListFirstBvid(mid, seasonId)
+	if err != nil {
+		res_error.Send(w, fmt.Sprintf("client.GetSeasonsArchivesList: %v", err))
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: bvid}.Write(w)
+})
+
+var getFavList = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	mediaId, err := strconv.Atoi(r.URL.Query().Get("mediaId"))
+	if err != nil {
+		res_error.Send(w, res_error.ParamError)
+		return
+	}
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil || sessdata == "" {
+		res_error.Send(w, res_error.NotLogin)
+		return
+	}
+	client := bilibili.BiliClient{SESSDATA: sessdata}
+	favList, err := client.GetFavlist(mediaId)
+	if err != nil {
+		res_error.Send(w, err.Error())
+		return
+	}
+	util.Res{Success: true, Message: "获取成功", Data: favList}.Write(w)
+})
@@ -0,0 +1,501 @@
+package task
+
+import (
+	"bufio"
+	"database/sql"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"bilidown/bilibili"
+	"bilidown/common"
+	"bilidown/util"
+)
+
+// TaskInitOption 创建任务时需要从 POST 请求获取的参数
+type TaskInitOption struct {
+	Bvid         string             `json:"bvid"`
+	Cid          int                `json:"cid"`
+	Format       common.MediaFormat `json:"format"`
+	Title        string             `json:"title"`
+	Owner        string             `json:"owner"`
+	Cover        string             `json:"cover"`
+	Status       TaskStatus         `json:"status"`
+	Folder       string             `json:"folder"`
+	Audio        string             `json:"audio"`
+	Video        string             `json:"video"`
+	Duration     int                `json:"duration"`
+	DownloadType string             `json:"downloadType"`
+}
+
+// TaskInDB 任务数据库中的数据
+type TaskInDB struct {
+	TaskInitOption
+	ID       int64     `json:"id"`
+	CreateAt time.Time `json:"createAt"`
+}
+
+func (task *TaskInDB) FilePath() string {
+	ext := ".mp4"
+	if task.DownloadType == "audio" {
+		ext = ".m4a"
+	}
+	return filepath.Join(task.Folder,
+		fmt.Sprintf("%s %s%s", task.Title,
+			strings.Replace(base64.StdEncoding.EncodeToString([]byte(strconv.FormatInt(task.ID, 10))), "=", "", -1),
+			ext,
+		),
+	)
+}
+
+// done | waiting | running | error
+type TaskStatus string
+
+type Task struct {
+	TaskInDB
+	AudioProgress float64 `json:"audioProgress"`
+	VideoProgress float64 `json:"videoProgress"`
+	MergeProgress float64 `json:"mergeProgress"`
+}
+
+var GlobalTaskList = []*Task{}
+var GlobalTaskMux = &sync.Mutex{}
+var GlobalDownloadSem = util.NewSemaphore(3)
+var GlobalMergeSem = util.NewSemaphore(3)
+
+func (task *Task) Create(db *sql.DB) error {
+	util.SqliteLock.Lock()
+	result, err := db.Exec(`INSERT INTO "task" ("bvid", "cid", "format", "title", "owner", "cover", "status", "folder", "duration", "download_type")
+	VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+		task.Bvid,
+		task.Cid,
+		task.Format,
+		task.Title,
+		task.Owner,
+		task.Cover,
+		task.Status,
+		task.Folder,
+		task.Duration,
+		task.DownloadType,
+	)
+	util.SqliteLock.Unlock()
+	if err != nil {
+		return err
+	}
+
+	task.ID, err = result.LastInsertId()
+	task.CreateAt = time.Now()
+	return err
+}
+
+// Create 创建任务，并将任务加入全局任务列表
+func (task *Task) Start() {
+	if task.DownloadType == "" {
+		task.DownloadType = "merge"
+	}
+	GlobalTaskMux.Lock()
+	GlobalTaskList = append(GlobalTaskList, task)
+	GlobalTaskMux.Unlock()
+	db := util.MustGetDB()
+	defer db.Close()
+	sessdata, err := bilibili.GetSessdata(db)
+	if err != nil {
+		task.UpdateStatus(db, "error", fmt.Errorf("bilibili.GetSessdata: %v", err))
+		return
+	}
+	client := &bilibili.BiliClient{SESSDATA: sessdata}
+
+	GlobalDownloadSem.Acquire()
+	task.UpdateStatus(db, "running")
+
+	if task.DownloadType == "audio" {
+		// 仅音频模式：只下载音频，重命名音频文件为输出文件
+		err = DownloadMedia(client, task.Audio, task, "audio")
+		if err != nil {
+			GlobalDownloadSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("DownloadMedia: %v", err))
+			return
+		}
+		GlobalDownloadSem.Release()
+		outputPath := task.TaskInDB.FilePath()
+		audioPath := filepath.Join(task.Folder, strconv.FormatInt(task.ID, 10)+".audio")
+		err = os.Rename(audioPath, outputPath)
+		if err != nil {
+			task.UpdateStatus(db, "error", fmt.Errorf("os.Rename: %v", err))
+			return
+		}
+		// 添加元数据
+		if err := task.addMetadata(outputPath); err != nil {
+			log.Printf("添加元数据失败 (任务ID: %d): %v", task.ID, err)
+		}
+		task.UpdateStatus(db, "done")
+		return
+	} else if task.DownloadType == "video" {
+		// 仅视频模式：只下载视频，重命名视频文件为输出文件
+		err = DownloadMedia(client, task.Video, task, "video")
+		if err != nil {
+			GlobalDownloadSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("DownloadMedia: %v", err))
+			return
+		}
+		GlobalDownloadSem.Release()
+		outputPath := task.TaskInDB.FilePath()
+		videoPath := filepath.Join(task.Folder, strconv.FormatInt(task.ID, 10)+".video")
+		err = os.Rename(videoPath, outputPath)
+		if err != nil {
+			task.UpdateStatus(db, "error", fmt.Errorf("os.Rename: %v", err))
+			return
+		}
+		// 添加元数据
+		if err := task.addMetadata(outputPath); err != nil {
+			log.Printf("添加元数据失败 (任务ID: %d): %v", task.ID, err)
+		}
+		task.UpdateStatus(db, "done")
+		return
+	} else {
+		// 合并模式：下载音频和视频，然后合并
+		err = DownloadMedia(client, task.Audio, task, "audio")
+		if err != nil {
+			GlobalDownloadSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("DownloadMedia: %v", err))
+			return
+		}
+		err = DownloadMedia(client, task.Video, task, "video")
+		if err != nil {
+			GlobalDownloadSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("DownloadMedia: %v", err))
+			return
+		}
+		GlobalDownloadSem.Release()
+
+		outputPath := task.TaskInDB.FilePath()
+		videoPath := filepath.Join(task.Folder, strconv.FormatInt(task.ID, 10)+".video")
+		audioPath := filepath.Join(task.Folder, strconv.FormatInt(task.ID, 10)+".audio")
+		GlobalMergeSem.Acquire()
+		err = task.MergeMedia(outputPath, videoPath, audioPath)
+		if err != nil {
+			GlobalMergeSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("task.MergeMedia: %v", err))
+			return
+		}
+		err = os.Remove(videoPath)
+		if err != nil {
+			GlobalMergeSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("os.Remove: %v", err))
+			return
+		}
+		err = os.Remove(audioPath)
+		if err != nil {
+			GlobalMergeSem.Release()
+			task.UpdateStatus(db, "error", fmt.Errorf("os.Remove: %v", err))
+			return
+		}
+		GlobalMergeSem.Release()
+		// 添加元数据
+		if err := task.addMetadata(outputPath); err != nil {
+			log.Printf("添加元数据失败 (任务ID: %d): %v", task.ID, err)
+		}
+		task.UpdateStatus(db, "done")
+	}
+}
+
+// 合并音视频
+func (task *Task) MergeMedia(outputPath string, inputPaths ...string) error {
+	inputs := []string{}
+	for _, path := range inputPaths {
+		inputs = append(inputs, "-i", path)
+	}
+
+	ffmpegPath, err := util.GetFFmpegPath()
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command(ffmpegPath, append(inputs, "-c:v", "copy", "-c:a", "copy", "-progress", "pipe:1", "-strict", "-2", outputPath)...)
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	scanner := bufio.NewScanner(stdout)
+
+	progress := newProgressBar(int64(task.Duration))
+	outTimeRegex := regexp.MustCompile(`out_time_ms=(\d+)`) // 毫秒
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		match := outTimeRegex.FindStringSubmatch(line)
+		if len(match) == 2 {
+			outTime, err := strconv.ParseInt(match[1], 10, 64)
+			if err != nil {
+				return err
+			}
+			progress.current = outTime / 1000000
+			task.MergeProgress = progress.percent()
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return err
+	}
+
+	if err := cmd.Wait(); err != nil {
+		return err
+	}
+	task.MergeProgress = 1
+	return nil
+}
+
+func GetVideoURL(medias []bilibili.Media, format common.MediaFormat) (string, error) {
+	for _, code := range []int{12, 7, 13} {
+		for _, item := range medias {
+			if item.ID == format && item.Codecid == code {
+				return item.BaseURL, nil
+			}
+		}
+	}
+	return "", errors.New("未找到对应视频分辨率格式")
+}
+
+func GetAudioURL(dash *bilibili.Dash) string {
+	if dash.Flac != nil {
+		return dash.Flac.Audio.BaseURL
+	}
+	var maxAudioID common.MediaFormat
+	var audioURL string
+	for _, item := range dash.Audio {
+		if item.ID > maxAudioID {
+			maxAudioID = item.ID
+			audioURL = item.BaseURL
+		}
+	}
+	return audioURL
+}
+
+func (task *Task) UpdateStatus(db *sql.DB, status TaskStatus, errs ...error) error {
+	util.SqliteLock.Lock()
+	_, err := db.Exec(`UPDATE "task" SET "status" = ? WHERE "id" = ?`, status, task.ID)
+	util.SqliteLock.Unlock()
+	if err != nil {
+		return nil
+	}
+	for _, err := range errs {
+		if err != nil {
+			err = util.CreateLog(db, fmt.Sprintf("Task-%d-Error: %v", task.ID, err))
+			if err != nil {
+				log.Fatalln("CreateLog:", err)
+			}
+		}
+	}
+	task.Status = status
+	return err
+}
+
+func DownloadMedia(client *bilibili.BiliClient, _url string, task *Task, mediaType string) error {
+	var resp *http.Response
+	var err error
+	for i := 0; i < 5; i++ {
+		resp, err = client.SimpleGET(_url, nil)
+		if err == nil {
+			break
+		}
+	}
+
+	if err != nil {
+		return err
+	}
+
+	filename := strconv.FormatInt(task.ID, 10) + "." + mediaType
+	filepath := filepath.Join(task.Folder, filename)
+
+	progress := newProgressBar(resp.ContentLength)
+
+	file, err := os.Create(filepath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	reader := io.TeeReader(resp.Body, file)
+	buf := make([]byte, 1024)
+	for {
+		n, err := reader.Read(buf)
+		if err != nil && err != io.EOF {
+			return err
+		}
+		if n == 0 {
+			break
+		}
+
+		progress.add(n)
+		GlobalTaskMux.Lock()
+		if mediaType == "video" {
+			task.VideoProgress = progress.percent()
+		} else {
+			task.AudioProgress = progress.percent()
+		}
+		GlobalTaskMux.Unlock()
+	}
+	return nil
+}
+
+type progressBar struct {
+	total   int64
+	current int64
+}
+
+func (p *progressBar) add(n int) {
+	p.current += int64(n)
+}
+
+func (p *progressBar) percent() float64 {
+	return float64(p.current) / float64(p.total)
+}
+
+func newProgressBar(total int64) *progressBar {
+	return &progressBar{
+		total: total,
+	}
+}
+
+func GetTaskList(db *sql.DB, page int, pageSize int) ([]TaskInDB, error) {
+	tasks := []TaskInDB{}
+	util.SqliteLock.Lock()
+	rows, err := db.Query(`SELECT
+		"id", "bvid", "cid", "format", "title",
+		"owner", "cover", "status", "folder", "duration", "download_type", "create_at"
+	FROM "task" ORDER BY "id" DESC LIMIT ?, ?`,
+		page*pageSize, pageSize,
+	)
+	util.SqliteLock.Unlock()
+	if err != nil {
+		return nil, err
+	}
+
+	createAt := ""
+
+	for rows.Next() {
+		task := TaskInDB{}
+		err = rows.Scan(
+			&task.ID,
+			&task.Bvid,
+			&task.Cid,
+			&task.Format,
+			&task.Title,
+			&task.Owner,
+			&task.Cover,
+			&task.Status,
+			&task.Folder,
+			&task.Duration,
+			&task.DownloadType,
+			&createAt,
+		)
+		if err != nil {
+			return nil, err
+		}
+		task.CreateAt, err = time.Parse("2006-01-02 15:04:05", createAt)
+		if err != nil {
+			return nil, err
+		}
+		tasks = append(tasks, task)
+	}
+	return tasks, nil
+}
+
+func DeleteTask(db *sql.DB, taskID int) error {
+	util.SqliteLock.Lock()
+	_, err := db.Exec(`DELETE FROM "task" WHERE "id" = ?`, taskID)
+	util.SqliteLock.Unlock()
+	return err
+}
+
+func GetTask(db *sql.DB, taskID int) (*TaskInDB, error) {
+	task := TaskInDB{}
+	createAt := ""
+	util.SqliteLock.Lock()
+	err := db.QueryRow(`SELECT
+		"id", "bvid", "cid", "format", "title",
+		"owner", "cover", "status", "folder", "duration", "download_type", "create_at"
+	FROM "task" WHERE "id" = ?`,
+		taskID,
+	).Scan(
+		&task.ID,
+		&task.Bvid,
+		&task.Cid,
+		&task.Format,
+		&task.Title,
+		&task.Owner,
+		&task.Cover,
+		&task.Status,
+		&task.Folder,
+		&task.Duration,
+		&task.DownloadType,
+		&createAt,
+	)
+	util.SqliteLock.Unlock()
+	if err != nil {
+		return nil, err
+	}
+
+	task.CreateAt, err = time.Parse("2006-01-02 15:04:05", createAt)
+	if err != nil {
+		return nil, err
+	}
+	return &task, nil
+}
+
+// addMetadata 使用 ffmpeg 给输出文件添加元数据（description 和 artist）
+func (task *Task) addMetadata(filePath string) error {
+	ffmpegPath, err := util.GetFFmpegPath()
+	if err != nil {
+		return err
+	}
+
+	desc := task.Bvid
+	if desc == "" {
+		desc = ""
+	}
+
+	author := task.Owner
+
+	// 临时文件加上 .mp4 扩展名
+	tempPath := filePath + ".tmp.mp4"
+
+	// 使用双引号包裹文件路径，避免特殊字符
+	cmd := exec.Command(ffmpegPath,
+		"-i", filePath,
+		"-metadata", "description="+desc,
+		"-metadata", "artist="+author,
+		"-codec", "copy",
+		"-y",
+		tempPath,
+	)
+
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("ffmpeg添加元数据失败: %v, 输出: %s", err, string(output))
+	}
+
+	if err := os.Remove(filePath); err != nil {
+		return fmt.Errorf("删除原文件失败: %v", err)
+	}
+	if err := os.Rename(tempPath, filePath); err != nil {
+		return fmt.Errorf("重命名临时文件失败: %v", err)
+	}
+
+	return nil
+}
@@ -0,0 +1,39 @@
+package task_test
+
+import (
+	"bufio"
+	"fmt"
+	"os/exec"
+	"testing"
+)
+
+func TestFFMPEG(t *testing.T) {
+	cmd := exec.Command("ffmpeg", "-i", `E:\bilidown\27.video`, "-i", `E:\bilidown\27.audio`, "-c:v", "copy", "-c:a", "copy", "-progress", "pipe:1", `E:\bilidown\27.mp4`)
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		t.Fatal(err)
+	}
+
+	scanner := bufio.NewScanner(stdout)
+	for scanner.Scan() {
+		fmt.Println(">>>", scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := cmd.Wait(); err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log("done")
+}
+
+func TestNum(t *testing.T) {
+	t.Log(int64(100999) / 1000)
+}
@@ -0,0 +1,151 @@
+package util
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+	"sync"
+)
+
+func CreateLog(db *sql.DB, content string) error {
+	SqliteLock.Lock()
+	_, err := db.Exec(`INSERT INTO "log" ("content") VALUES (?)`, content)
+	SqliteLock.Unlock()
+	return err
+}
+
+func GetFields(db *sql.DB, names ...string) (map[string]string, error) {
+
+	if len(names) == 0 {
+		return nil, nil
+	}
+
+	placeholders := make([]string, len(names))
+	for i := 0; i < len(names); i++ {
+		placeholders[i] = "?"
+	}
+	query := fmt.Sprintf(`SELECT "name", "value" FROM "field" WHERE "name" IN (%s)`, strings.Join(placeholders, ","))
+
+	values := make([]interface{}, len(names))
+	for i := 0; i < len(names); i++ {
+		values[i] = names[i]
+	}
+	SqliteLock.Lock()
+	row, err := db.Query(query, values...)
+	SqliteLock.Unlock()
+	if err != nil {
+		return nil, err
+	}
+	defer row.Close()
+	var name, value string
+	fields := make(map[string]string)
+	for row.Next() {
+		if err := row.Scan(&name, &value); err != nil {
+			return nil, err
+		}
+		fields[name] = value
+	}
+	return fields, nil
+}
+
+func SaveFields(db *sql.DB, data [][2]string) error {
+
+	if len(data) == 0 {
+		return nil
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err != nil {
+			tx.Rollback()
+		} else {
+			tx.Commit()
+		}
+	}()
+
+	stmt, err := tx.Prepare(`INSERT OR REPLACE INTO "field" ("name", "value") VALUES (?, ?)`)
+	if err != nil {
+		return err
+	}
+	defer stmt.Close()
+
+	for _, d := range data {
+		SqliteLock.Lock()
+		_, err = stmt.Exec(d[0], d[1])
+		SqliteLock.Unlock()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetCurrentFolder 获取数据库中的下载保存路径，如果不存在则将默认路径保存到数据库
+func GetCurrentFolder(db *sql.DB) (string, error) {
+	var folder string
+	SqliteLock.Lock()
+	err := db.QueryRow(`SELECT "value" FROM "field" WHERE "name" = 'download_folder'`).Scan(&folder)
+	SqliteLock.Unlock()
+	if err != nil && err == sql.ErrNoRows {
+		folder, err = GetDefaultDownloadFolder()
+		if err != nil {
+			return "", err
+		}
+		err = os.MkdirAll(folder, os.ModePerm)
+		if err != nil {
+			return "", err
+		}
+		err = SaveDownloadFolder(db, folder)
+		if err != nil {
+			return "", err
+		}
+		return folder, nil
+	}
+	err = os.MkdirAll(folder, os.ModePerm)
+	if err != nil {
+		return "", err
+	}
+	return folder, nil
+}
+
+// SaveDownloadFolder 保存下载路径，不存在则自动创建
+func SaveDownloadFolder(db *sql.DB, downloadFolder string) error {
+	_, err := os.Stat(downloadFolder)
+	if err != nil {
+		if os.IsNotExist(err) {
+			err = os.MkdirAll(downloadFolder, os.ModePerm)
+			if err != nil {
+				return err
+			}
+		}
+		return err
+	}
+	SqliteLock.Lock()
+	_, err = db.Exec(`INSERT OR REPLACE INTO "field" ("name", "value") VALUES ('download_folder', ?)`, downloadFolder)
+	SqliteLock.Unlock()
+	return err
+}
+
+var SqliteLock sync.Mutex
+
+func MustGetDB(path ...string) *sql.DB {
+	pathStr := ""
+	if len(path) == 0 {
+		pathStr = "./data.db"
+	} else if len(path) > 1 {
+		log.Fatalln(errors.New("len(path) <= 1"))
+	} else {
+		pathStr = path[0]
+	}
+	db, err := sql.Open("sqlite", pathStr)
+	if err != nil {
+		log.Fatalln("sql.Open:", err)
+	}
+	return db
+}
@@ -0,0 +1,36 @@
+package util
+
+type FieldUtil struct{}
+
+func (f FieldUtil) AllowSelect() []string {
+	return []string{
+		"download_folder",
+	}
+}
+
+func (f FieldUtil) AllowUpdate() []string {
+	return []string{
+		"download_folder",
+	}
+}
+
+func (f FieldUtil) IsAllow(allFields []string, names ...string) bool {
+	allowedFields := make(map[string]struct{})
+	for _, field := range allFields {
+		allowedFields[field] = struct{}{}
+	}
+	for _, name := range names {
+		if _, exists := allowedFields[name]; !exists {
+			return false
+		}
+	}
+	return true
+}
+
+func (f FieldUtil) IsAllowSelect(names ...string) bool {
+	return f.IsAllow(f.AllowSelect(), names...)
+}
+
+func (f FieldUtil) IsAllowUpdate(names ...string) bool {
+	return f.IsAllow(f.AllowUpdate(), names...)
+}
@@ -0,0 +1,26 @@
+package res_error
+
+import (
+	"net/http"
+
+	"bilidown/util"
+)
+
+// Send 发送异常响应
+func Send(w http.ResponseWriter, message string) {
+	util.Res{Message: message, Success: false}.Write(w)
+}
+
+const (
+	BvidFormatError       = "错误的 Bvid 格式"
+	URLFormatError        = "错误的 URL 格式"
+	MidFormatError        = "错误的 Mid 格式"
+	SeasonIdFormatError   = "错误的 SeasonId 格式"
+	ParamError            = "参数错误"
+	MethodNotAllowError   = "不允许的请求方式"
+	NoLocationError       = "无重定向目标地址"
+	FileNotFountError     = "文件不存在"
+	FileTypeNotAllowError = "不允许的文件类型"
+	SystemError           = "系统错误"
+	NotLogin              = "未登录"
+)
@@ -0,0 +1,23 @@
+package util
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// 统一的 JSON 响应结构
+type Res struct {
+	Success bool   `json:"success"`
+	Message string `json:"message"`
+	Data    any    `json:"data"`
+}
+
+// 发送响应
+func (r Res) Write(w http.ResponseWriter) {
+	bs, err := json.Marshal(r)
+	if err != nil {
+		w.Write([]byte(`{"success":false,"message":"系统错误","data":null}`))
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.Write(bs)
+}
@@ -0,0 +1,28 @@
+package util
+
+import "sync"
+
+type Semaphore struct {
+	ch chan struct{}
+	wg sync.WaitGroup
+}
+
+func NewSemaphore(concurrency int) *Semaphore {
+	return &Semaphore{
+		ch: make(chan struct{}, concurrency),
+	}
+}
+
+func (s *Semaphore) Acquire() {
+	s.ch <- struct{}{}
+	s.wg.Add(1)
+}
+
+func (s *Semaphore) Release() {
+	<-s.ch
+	s.wg.Done()
+}
+
+func (s *Semaphore) Wait() {
+	s.wg.Wait()
+}
@@ -0,0 +1,92 @@
+package util
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"errors"
+	"net/http"
+	"net/url"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strconv"
+
+	"bilidown/common"
+)
+
+func CheckBvidFormat(bvid string) bool {
+	return regexp.MustCompile("^BV1[a-zA-Z0-9]+").MatchString(bvid)
+}
+
+// GetDefaultDownloadFolder 获取默认下载路径
+func GetDefaultDownloadFolder() (string, error) {
+	return filepath.Abs("./download")
+}
+
+func IsNumber(str string) bool {
+	_, err := strconv.Atoi(str)
+	return err == nil
+}
+
+// IsValidURL 判断字符串是否为合法的URL
+func IsValidURL(u string) bool {
+	_, err := url.ParseRequestURI(u)
+	return err == nil
+}
+
+// IsValidFormatCode 判断格式码是否合法
+func IsValidFormatCode(format common.MediaFormat) bool {
+	allowed := []common.MediaFormat{6, 16, 32, 64, 74, 80, 112, 116, 120, 125, 126, 127}
+	for _, v := range allowed {
+		if v == format {
+			return true
+		}
+	}
+	return false
+}
+
+// FilterFileName 过滤字符串中的特殊字符，使其允许作为文件名。
+func FilterFileName(fileName string) string {
+	return regexp.MustCompile(`[\\/:*?"<>|\n]`).ReplaceAllString(fileName, "")
+}
+
+// GetFFmpegPath 获取可用的 FFmpeg 执行路径。
+func GetFFmpegPath() (string, error) {
+	if err := exec.Command("ffmpeg", "-version").Run(); err == nil {
+		return "ffmpeg", nil
+	}
+	if err := exec.Command("bin/ffmpeg", "-version").Run(); err == nil {
+		return "bin/ffmpeg", nil
+	}
+	return "", errors.New("ffmpeg not found")
+}
+
+// GetRedirectedLocation 获取响应头中的 Location，不会自动跟随重定向。
+func GetRedirectedLocation(url string) (string, error) {
+	client := &http.Client{
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+	}
+	request, err := http.NewRequest("HEAD", url, nil)
+	if err != nil {
+		return "", err
+	}
+	response, err := client.Do(request)
+	if err != nil {
+		return "", err
+	}
+	if locationURL, err := response.Location(); err != nil {
+		return "", err
+	} else {
+		return locationURL.String(), nil
+	}
+}
+
+func MD5Hash(str string) string {
+	hasher := md5.New()
+	hasher.Write([]byte(str))
+	hash := hasher.Sum(nil)
+	hashString := hex.EncodeToString(hash)
+	return hashString
+}
@@ -0,0 +1,29 @@
+package util_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"bilidown/common"
+	"bilidown/util"
+)
+
+func TestRandomString(t *testing.T) {
+	for i := 4; i < 10; i++ {
+		for j := 0; j < 3; j++ {
+			str := common.RandomString(i)
+			t.Log(str)
+		}
+		t.Log("\n")
+	}
+}
+
+func TestGetRedirectedLocation(t *testing.T) {
+	os.Setenv("https_proxy", "http://192.168.1.5:9000")
+	if location, err := util.GetRedirectedLocation("https://b23.tv/Ga6sbzT"); err != nil {
+		t.Error(err)
+	} else {
+		fmt.Println(location)
+	}
+}